Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X125S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø40mm bore and 125mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ40 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
A 125 mm stroke at 40 mm bore gives the MARU40X125S room for real work: at 0.5 MPa it pushes 628 N and pulls 528 N, and at 0.7 MPa the push climbs to 880 N. The MAR body is double acting with a variable air cushion at both ends, and the up-mount front bracket is already part of the cylinder, so it bolts to the machine top face without a separate flange or foot.
Because the magnet is fitted as standard, CMSG, DMSG or EMSG switches clip on for end-of-stroke sensing with no special piston order.
Airtac MARU Stainless Steel Mini Cylinder MARU40X125S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X125S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 40 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (double rod, adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MARU Stainless Steel Mini Cylinder MARU40X125S Is Used
Stopper gate on a packaging line
A 125 mm stroke extends a stopper blade under cartons moving at 30-800 mm/s cylinder speed; 628 N at 0.5 MPa easily holds a 30 kg carton stream against light conveyor backpressure.
Clamping fixture on a CNC jig
The up-mounted 40 mm body bolts under a milling fixture table; 377 N of working force clamps aluminum housings while the cushion takes the snap out of the close.
Lift-assist post for small hoppers
Pushing upward from the top bracket, the cylinder raises a 30 kg ingredient hopper with margin; the stainless barrel copes with daily washdown in a food plant.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X125S the Right Cylinder?
Step down to the 32 mm bore (402 N push at 0.5 MPa) if the load is under about 240 N, or step up to the 50 mm bore (981 N at 0.5 MPa) above 580 N. The MAR does not hold position when air is lost - the rod drifts - so add a rod lock if the load must stay put on power failure. Keep side loads off the 16 mm rod over the 125 mm travel; guide the load externally if the path is not perfectly aligned.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MARU Stainless Steel Mini Cylinder MARU40X125S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa the push rises to 879.6 N and the pull to 738.9 N. The theoretical maximum at 1.0 MPa is 128.1 kgf. It is double acting, runs on 0.15-1.0 MPa (22-145 psi) air and covers the 125 mm stroke at 30-800 mm/s.
Every MA-series cylinder ships with the piston magnet already installed, so CMSG, DMSG or EMSG reed switches mount straight onto the stainless barrel to signal rod position - no special-order piston and no extra option code.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.